When trying to determine the etiology of AKI (pre-renal, renal, post-renal) FeNa is often checked. It would be expected in Pre-renal to be <1%, but this is NOT the case in patients using diuretics. there will be renal wasting of sodium (Na) despite hypovolemia and be high regardless of the pathologic process. In this setting, FeUrea is a more reliable indicator of pre-renal vs. renal. [1]
References
1. Carvounis, CP et al. Significance of the fractional excretion of urea in the differential diagnosis of acute renal failure. Kidney Int. 2002 Dec;62(6):2223-9.
Mixed apneas are characterized by absent respiratory effort and airflow in the first section of…
Although rare, the differential diagnosis of hypoventilation and hypercapnia respiratory failure includes hypothyroidism. It is…
B-type natriuretic peptide (BNP) is a hormone created in response to cardiac wall stretch due…
A common finding described on computed tomography (CT) imaging. A disease with a peribronchovascular distribution…
Though often used synonymously; Trapped Lung and Lung Entrapment technically describe separate entities along the…
It is not clearly understood why patients with pulmonary hypertension (PH) develop pericardial effusions. However,…
This website uses cookies.